class CreateMaterialsPublishersRestrictions < ActiveRecord::Migration
   def self.up
#	execute "ALTER TABLE materials_publishers ADD CONSTRAINT fk_materials FOREIGN KEY (material_id) REFERENCES materials(id)"
#	execute "ALTER TABLE materials_publishers ADD CONSTRAINT fk_publishers FOREIGN KEY (publisher_id) REFERENCES publishers(id)"
  end

  def self.down
#	execute "ALTER TABLE materials_publishers DROP CONSTRAINT fk_materials"
#	execute "ALTER TABLE materials_publishers DROP CONSTRAINT fk_publishers"
  end
end
